六年级上册数学题100道,可以有脱式计算,简便运算(最好少些),解方程...

Question

如题所述

Answer 1

32×125×25 = 4×8×125×25 = (4×25)×(8×125) = 100×1000 = 100000
9048÷26 = (2600+2600+2600+1248)÷26 = 2600÷26 + 2600÷26 + 2600÷26 + 1248÷26 = 100 + 100 + 100 + 48 = 348
2881÷43 = (1290+1591)÷43 = 1290÷43 + 1591÷43 = 30 + 37 = 67
3.2×42.3×3.75 - 12.5×0.423×16 = 3.2×42.3×3.75 - 1.25×42.3×1.6 = 42.3×(3.2×3.75 - 1.25×1.6) = 42.3×(4×0.8×3.75 - 1.25×4×0.4) = 42.3×(4×0.4×2×3.75 - 1.25×4×0.4) = 42.3×(4×0.4×7.5 - 1.25×4×0.4) = 42.3×[4×0.4×(7.5 - 1.25)] = 42.3×[4×0.4×6.25] = 42.3×(4×2.5) = 423
1.8 + 12 - 0.5×0.3 = 1.8 + 12 - 0.15 = 13.8 - 0.15 = 13.65
(80 - 9.8)×5 - 2 - 1.32 = 70.2×2/5 - 1.32 = 28.08 - 1.32 = 26.76
8×7/4 ÷ [1/(3.2 - 2.95)] = 8×4/7 ÷ [1/0.25] = 8×4/7 ÷ 4 = 8/7
2700×(506 - 499) ÷ 900 = 2700×7 ÷ 900 = 18900 ÷ 900 = 21
33.02 - (148.4 - 90.85) ÷ 2.5 = 33.02 - 57.55 ÷ 2.5 = 33.02 - 23.02 = 10
(1÷1 - 1) ÷ 5.1 = (1 - 1) ÷ 5.1 = 0 ÷ 5.1 = 0
18.1 + (3 - 0.299÷0.23)×1 = 18.1 + (3 - 1.30173913)×1 = 18.1 + 1.69826087×1 = 18.1 + 1.69826087 = 19.79826087
最后祝学习进步!!!