4点26×35点2+8点52×23点3+2点13×36点4用简便方法
4点26×35点2+8点52×23点3+2点13×36点4用简便方法
4.26*35.2+8.52*23.3+2.13*36.4
=2.13*2*35.2+2.13*36.4+8.52*23.3
=2.13*70.4+2.13*36.4+8.52*23.3
=2.13*(70.4+36.4)+8.52*23.3
=2.13*106.8+2.13*4*23.3
=2.13*(106.8+23.3*4)
=2.13*(106.8+93.2)=2.13*200=426
68点5×4点8+6点85×52用简便方法
68.5×4.8+6.85×52用简便方法如下:
68.5×4.8+6.85×52
=68.5×4.8+68.5×5.2
=68.5×(4.8+5.2)
=68.5×10
=685
4.2×7点8+2点2×4点2的简便方法
4.2×7.8+2.2×4.2
=4.2×(7.8+2.2)
=4.2×10
=42
5.6×2点4+2点4×1点3+16点9×7点6用简便方法
5.6×2.4+2.4×1.3+16.9×7.6
=2.4×(5.6+1.3)+16.9×7.6
=2.4×6.9+(6.9+10)×7.6
=6.9×(2.4+7.6)+10×7.6
=69+76
=145
100—13点27一23点52—63点21简便方法
100 - 13.27 - 23.52 - 63.21
= 100 - (13.27+23.52+63.21)
= 100 - (13+23+63+0.27+0.52+0.21)
= 100 -( 99 + 1)
= 0
27点26减(16点8减2点74)用简便方法
27.26-(16.8-2.74)
解:简便计算
=27.26-16.8+2.74
=27.26+2.74-16.8
=30-16.8
=13.2
祝学习进步。
用简便方法计算3点8乘零点4的积乘2点5
3.8x0.4x2.5
=3.8x(0.4x2.5)
=3.8x1
=3.8
希望帮到你 望采纳 谢谢 加油
四点2×7点8+2点4×10点二用简便方法计算
用简便方法计算
4.2×7.8+2.4×10.2
=4.2×(7.8+10.2)
=4.2×18
=75.6
16.8-2点3+13点2.7.7用简便方法
16.8-2.3+13.2-7.7简便方法
16.8-2.3+13.2-7.7
=(16.8+13.2)-(2.3+7.7)
=30-10
=20
3.6×0点5-4点8×0点2用简便方法怎么算
解:
3.6x0.5-4.8x0.2
=(1.2x3)x0.5-(1.2x4)x0.2
=1.2x1.5-1.2x0.8 运用乘法分配律
=(1.5-0.8)x1.2
=0.7x1.2
=0.84
祝学习进步。