1樓:希望小學
0.26 + 0.35 = 0.
610.33 + 0.45 = 0.
780.4 + 0.55 = 0.
950.47 + 0.65 = 1.
120.54 + 0.75 = 1.
290.61 + 0.85 = 1.
460.68 + 0.95 = 1.
630.75 + 1.05 = 1.
80.82 + 1.15 = 1.
970.89 + 1.25 = 2.
140.96 + 1.35 = 2.
311.03 + 1.45 = 2.
481.1 + 1.55 = 2.
651.17 + 1.65 = 2.
821.24 + 1.75 = 2.
991.31 + 1.85 = 3.
161.38 + 1.95 = 3.
331.45 + 2.05 = 3.
51.52 + 2.15 = 3.
671.59 + 2.25 = 3.
841.66 + 2.35 = 4.
011.73 + 2.45 = 4.
181.8 + 2.55 = 4.
351.87 + 2.65 = 4.
521.94 + 2.75 = 4.
692.01 + 2.85 = 4.
862.33 × 1.5 = 3.
4952.4 × 2 = 4.82.
47 × 2.5 = 6.1752.
54 × 3 = 7.622.61 × 3.
5 = 9.1352.68 × 4 = 10.
722.75 × 4.5 = 12.
3752.82 × 5 = 14.12.
89 × 5.5 = 15.8952.
96 × 6 = 17.763.03 × 6.
5 = 19.6953.1 × 7 = 21.
73.17 × 7.5 = 23.
7753.24 × 8 = 25.923.
31 × 8.5 = 28.1353.
38 × 9 = 30.423.45 × 9.
5 = 32.7753.52 × 10 = 35.
23.59 × 10.5 = 37.
6953.66 × 11 = 40.263.
73 × 11.5 = 42.8953.
8 × 12 = 45.63.87 × 12.
5 = 48.3753.94 × 13 = 51.
223.25 - 2.15 = 1.
14.02 - 2.75 = 1.
274.79 - 3.35 = 1.
445.56 - 3.95 = 1.
616.33 - 4.55 = 1.
787.1 - 5.15 = 1.
957.87 - 5.75 = 2.
128.64 - 6.35 = 2.
299.41 - 6.95 = 2.
4610.18 - 7.55 = 2.
6310.95 - 8.15 = 2.
811.72 - 8.75 = 2.
9712.49 - 9.35 = 3.
1413.26 - 9.95 = 3.
3114.03 - 10.55 = 3.
4814.8 - 11.15 = 3.
6515.57 - 11.75 = 3.
8216.34 - 12.35 = 3.
9917.11 - 12.95 = 4.
1617.88 - 13.55 = 4.
3318.65 - 14.15 = 4.
519.42 - 14.75 = 4.
6720.19 - 15.35 = 4.
8420.96 - 15.95 = 5.
0121.73 - 16.55 = 5.
1822.5 - 17.15 = 5.
352.5 ÷ 0.5 = 5.
003 ÷ 1 = 3.00
3.5 ÷ 1.5 = 2.334 ÷ 2 = 2.00
4.5 ÷ 2.5 = 1.805 ÷ 3 = 1.67
5.5 ÷ 3.5 = 1.576 ÷ 4 = 1.50
6.5 ÷ 4.5 = 1.447 ÷ 5 = 1.40
7.5 ÷ 5.5 = 1.368 ÷ 6 = 1.33
8.5 ÷ 6.5 = 1.319 ÷ 7 = 1.29
9.5 ÷ 7.5 = 1.
2710 ÷ 8 = 1.2510.5 ÷ 8.
5 = 1.2411 ÷ 9 = 1.2211.
5 ÷ 9.5 = 1.2112 ÷ 10 = 1.
2012.5 ÷ 10.5 = 1.
1913 ÷ 11 = 1.1813.5 ÷ 11.
5 = 1.1714 ÷ 12 = 1.17
2樓:心碎已絕望
書是那個版的 那個年級的 具體關於什麼的題
小學六年級數學計算題大全(附答案)
100道初中數學計算題及答案
3樓:水瓶漠漠
=5*3√2-2*4√2+5√2
=√2(15-8+5)
=12√2
②√6-√3/2-√2/3
=√6-√6/2-√6/3
=√6/6
③(√45+√27)-(√4/3+√125)
=(3√5+3√3)-(2√3/3+5√5)
=-2√5+7√5/3
④(√4a-√50b)-2(√b/2+√9a)
=(2√a-5√2b)-2(√2b/2+3√a)
=-4√a-6√2b
⑤√4x*(√3x/2-√x/6)
=2√x(√6x/2-√6x/6)
=2√x*(√6x/3)
=2/3*|x|*√6
⑥(x√y-y√x)÷√xy
=x√y÷√xy-y√x÷√xy
=√x-√y
⑦(3√7+2√3)(2√3-3√7)
=(2√3)^2-(3√7)^2
=12-63
=-51
⑧(√32-3√3)(4√2+√27)
=(4√2-3√3)(4√2+3√3)
=(4√2)^2-(3√3)^2
=32-27
=5 ⑨(3√6-√4)?
=(3√6)^2-2*3√6*√4+(√4)^2
=54-12√6+4
=58-12√6
⑩(1+√2-√3)(1-√2+√3)
=[1+(√2-√3)][1-(√2-√3)]
=1-(√2-√3)^2
=1-(2+3+2√6)
=-4-2√6
(1)5√12×√18
=5*2√3*3√2
=30√6;
(2)-6√45×(-4√48)
=6*3√5*4*4√3
=288√15;
(3)√(12a)×√(3a) /4
=√(36a^2)/4
=6a/4
=3a/2.
5. x^2(y+z)^2-2xy(x-z)(y+z)+y^2(x-z)^2
=[x(y+z)-y(x-z)]^2
=(xz+yz)^2
=z^2(x+y)^2
6. 3(a+2)^2+28(a+2)-20
=[3(a+2)-2][(a+2)+10]
=(3a+4)(a+12)
7. (a+b)^2-(b-c)^2+a^2-c^2
=(a+b)^2-c^2+a^2-(b-c)^2
=(a+b+c)(a+b-c)+(a+b-c)(a-b+c)
=(a+b-c)(a+b+c+a-b+c)
=2(a+b-c)(a+c)
8. x(x+1)(x^2+x-1)-2
=(x^2+x)(x^2+x-1)-2
=(x^2+x)^2-(x^2+x)-2
=(x^2+x-2)(x^2+x+1)
=(x+2)(x-1)(x^2+x+1)
9. 9x^2(x-1)^2-3(x^2-x)-56
=9x^2(x-1)^2-3x(x-1)-56
=[3x(x-1)-8][3x(x-1)+7]
=(3x^2-3x-8)(3x^2-3x+7)
有理數練習
練習一(b級)
(一)計算題:
(1)23+(-73) (2)(-84)+(-49) (3)7+(-2.04) (4)4.23+(-7.
57) (5)(-7/3)+(-7/6) (6)9/4+(-3/2) (7)3.75+(2.25)+5/4 (8)-3.
75+(+5/4)+(-1.5)
5. x^2(y+z)^2-2xy(x-z)(y+z)+y^2(x-z)^2
=[x(y+z)-y(x-z)]^2
=(xz+yz)^2
=z^2(x+y)^2
6. 3(a+2)^2+28(a+2)-20
=[3(a+2)-2][(a+2)+10]
=(3a+4)(a+12)
7. (a+b)^2-(b-c)^2+a^2-c^2
=(a+b)^2-c^2+a^2-(b-c)^2
=(a+b+c)(a+b-c)+(a+b-c)(a-b+c)
=(a+b-c)(a+b+c+a-b+c)
=2(a+b-c)(a+c)
8. x(x+1)(x^2+x-1)-2
=(x^2+x)(x^2+x-1)-2
=(x^2+x)^2-(x^2+x)-2
=(x^2+x-2)(x^2+x+1)
=(x+2)(x-1)(x^2+x+1)
9. 9x^2(x-1)^2-3(x^2-x)-56
=9x^2(x-1)^2-3x(x-1)-56
=[3x(x-1)-8][3x(x-1)+7]
=(3x^2-3x-8)(3x^2-3x+7)
望採納~~
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