3 运动定律与简便运算
递等式计算(能简算的要简算).
(1)191.3﹣47.2+96.9
(2)9.63+13.78﹣3.63
(3)50.03﹣6.5﹣0.5
(4)25×125×16
(5)2506﹣506×3+27
(6)99×63+63.
脱式计算.(能简算的要简算)
(1)1.25×8.37×0.8 (2)(9﹣2.35)×0.64 (3)0.25×32×12.5
(4)0.15×1999+0.15 (5)0.37×1.4﹣0.4×0.37 (6)8.7×9.9.
能简算的要用简便方法计算
24.1×1.5+7.59×15 (3.7+17×0.4)÷3.5 75.36÷12﹣4.32×0.5
8.8×0.125 7.6×5.3+3.7×7.6 6.6÷(0.68+0.42)
脱式计算,能简便的要用简便方法计算.
0.36×1.5×0.4 0.05×3.2×40 26×15.7+15.7×74
3.78×0.5﹣0.65 3.98+13.4×0.24 (9.37+9.37+9.37+9.37)×2.5.
计算,能简算的要简算.
3.2×1.8+2.54
198×0.51
1.25×32×2.5
0.8×72.4×12.5
5.2×10.1
2.5×3.7+6.3×2.5.
脱式计算(能简算的写出主要简算过程).
①40.5﹣2.6×7.8
②80.52÷6.6+2.48
③2.5×3.6+6.4×2.5
④3.2×(3.9÷0.26+1.5)
(1)60.28+0.72×4.3
(2)6.37﹣0.37×16
(3)3.8×99
(4)2.5×9×0.4×1.1
(5)2.6×(10.6﹣9.72)
(6)1.25×888.
7.02×900×0.6
0.035÷0.7÷0.5
13.6﹣13.6×0.7
5.62+3.1×0.6+3.38
(25﹣1.25×5)÷2.5
8.1×0.3+1.8×0.3+0.03.
直接写得数
12.7﹣(8.65+2.7) 92.5×0.25×4 6.7×0.9+6.7×0.1
8.25×9.9+0.825 3.4×8.7+34×0.13 6.5×1.1
合理计算
8.6×10.1 78.1﹣7.7÷0.7×5.2 〔(8.1﹣5.6)×0.9﹣1〕×0.4
8.25×4.08+0.75×4.08+4.08 1.25×32×2.5 8.1÷2+1.9÷2.