1.2×2.5=(0.3 )×2.5×( 4 )
99×4.3=( 100 ) ×4.3- ( 1 )×4.3
10.1×3.7=(10)×3.7+( 0.1 )×3.7
25×32×0.125=(25× 4 )×( 8 ×0.125)
7.4×2.9+7.4×( 7.1 )=(74 )=7.4×10
小朋友,要努力哈
1.2×2.5=(0.3 )×2.5×( 4 )
99×4.3=( 100 ) ×4.3- ( 1 )×4.3
10.1×3.7=(10)×3.7+( 0.1 )×3.7
25×32×0.125=(25× 4 )×( 8 ×0.125)
7.4×2.9+7.4×( 7.1 )=(74 )=7.4×10
小朋友,要努力哈