几道五年级乘法托式简算题:63乘10.1(托式简便算),25.6-9.9(托式简便算),6.41乘10.1(托式简便算)
问题描述:
几道五年级乘法托式简算题:63乘10.1(托式简便算),25.6-9.9(托式简便算),6.41乘10.1(托式简便算)
2.63乘9.9(托式简便算),7.61乘9+7.61(托式简便算),3.25-0.84-1.16(托式简便算)
答
几道五年级乘法托式简算题:
63乘10.1
=63×(10+0.1)
=630×10+63×0.1
=630+6.3
=636.3
25.6-9.9
=25.6-10+0.1
=15.6+0.1
=15.7
6.41乘10.1
=6.41×10+6.41×0.1
=64.1+0.641
=64.741
2.63乘9.9
=2.63×(10-0.1)
=2.63×10-6.23×0.1
=26.3-0.263
=26.073
7.61乘9+7.61
=7.61×(9+1)
=7.61×10
=76.1
3.25-0.84-1.16
=3.25-(0.84+1.16)
=3.25-2
=1.25