用喜欢的方法计算。
(1)3.45×102
(2)9.4×10.1
(3)0.46×1.9+0.54×1.9
(4)1.25×8.08
(1)3.45×102
(2)9.4×10.1
(3)0.46×1.9+0.54×1.9
(4)1.25×8.08
递等式计算(能巧算的要巧算)。
5.66-0.96÷6×5 4.12×6.9-4.12+4.12×1.1
(1÷0.2+0.2÷1)÷(6-3.4) (4.2-0.42)÷3.6+6.4
3.2÷(0.32×0.25) 7.2-1.2×[0.01÷(1-0.9)]
5.66-0.96÷6×5 4.12×6.9-4.12+4.12×1.1
(1÷0.2+0.2÷1)÷(6-3.4) (4.2-0.42)÷3.6+6.4
3.2÷(0.32×0.25) 7.2-1.2×[0.01÷(1-0.9)]
直接计算
0.12×0.5= 3.57÷0.7= 0.125×8= 0.72÷12=
(1﹣0.4)×5= 0.27+99×0.27= 2.33×0.5×2= 15×0.4×25=
25÷25÷25= 2.5×0.4÷2.5×0.4=
0.12×0.5= 3.57÷0.7= 0.125×8= 0.72÷12=
(1﹣0.4)×5= 0.27+99×0.27= 2.33×0.5×2= 15×0.4×25=
25÷25÷25= 2.5×0.4÷2.5×0.4=
计算下面各题,注意使用简便方法.
14.39+4.8+5.61+6.2
5.6÷2.5÷0.4
99×0.95+0.95
6.8+1.25×6.8×8
3.75÷[0.3×(1.34﹣0.84)]
14.39+4.8+5.61+6.2
5.6÷2.5÷0.4
99×0.95+0.95
6.8+1.25×6.8×8
3.75÷[0.3×(1.34﹣0.84)]
递等式计算
(1÷0.5+0.5÷1)×2.4 12.5×3.2×2.5
45.19-4.8+54.81+5.2 14.5×3.6-145+6.5×14.5
(1÷0.5+0.5÷1)×2.4 12.5×3.2×2.5
45.19-4.8+54.81+5.2 14.5×3.6-145+6.5×14.5