能简便的用简便计算 0.24×1.2×150 0.8×0.9÷0.8×0.9 9.9×4.3 8.12×98+8.12×2 6.4×(0.125+12.5)4.2×75÷25
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/19 15:26:11
![能简便的用简便计算 0.24×1.2×150 0.8×0.9÷0.8×0.9 9.9×4.3 8.12×98+8.12×2 6.4×(0.125+12.5)4.2×75÷25](/uploads/image/z/248675-59-5.jpg?t=%E8%83%BD%E7%AE%80%E4%BE%BF%E7%9A%84%E7%94%A8%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97+0.24%C3%971.2%C3%97150+0.8%C3%970.9%C3%B70.8%C3%970.9+9.9%C3%974.3+8.12%C3%9798%2B8.12%C3%972+6.4%C3%97%EF%BC%880.125%2B12.5%EF%BC%894.2%C3%9775%C3%B725)
能简便的用简便计算 0.24×1.2×150 0.8×0.9÷0.8×0.9 9.9×4.3 8.12×98+8.12×2 6.4×(0.125+12.5)4.2×75÷25
能简便的用简便计算 0.24×1.2×150 0.8×0.9÷0.8×0.9 9.9×4.3 8.12×98+8.12×2 6.4×(0.125+12.5)
4.2×75÷25
能简便的用简便计算 0.24×1.2×150 0.8×0.9÷0.8×0.9 9.9×4.3 8.12×98+8.12×2 6.4×(0.125+12.5)4.2×75÷25
0.24×1.2×150
=(0.24×30)×(1.2×5)
=7.2×6
=43.2
0.8×0.9÷0.8×0.9
=(0.8÷0.8)×(0.9×0.9)
=1×0.81
=0.81
9.9×4.3
=10×4.3-0.1×4.3
=43-0.43
=42.57
8.12×98+8.12×2
=8.12×(98+2)
=8.12×100
=812
6.4×(0.125+12.5)
=0.8×8×(0.125+12.5)
=0.8×(8×0.125+8×12.5)
=0.8×(1+100)
=0.8×1+0.8×100
=0.8+80
=80.8
4.2×75÷25
=4.2×(75÷25)
=4.2×3
=12.6
4.2*75*1/25
0.24x1.2x150=0.12x1.2x2x150=0.144x300=432
0.8x0.9÷0.8x0.9=0.9x0.9=0.81
9.9x4.3=(10-0.1)x4.3=43-0.43=42.57
8.12x98+8.12x2=8.12x(98+2)=812
6.4×(0.125+12.5)=0.8x8×(0.125+12.5)=(1+100)x0.8=80.8
4.2×75÷25=4.2x3=12.6