Question

7.4×0.19+0.26×1.9怎样简便运算？

Answer 1

=7.4×0.19+0.26×（0.19×10）
=7.4×0.19+2.6×0.19
=（7.4+2.6）×0.19
=10×0.19
=1.9

Answer 2

简便运算：
7.4×0.19+0.26×1.9
=7.4×0.19+2.6×0.19
=（7.4+2.6）×0.19
=10×0.19
=1.9

Answer 3

先把算式7.3×0.19+0.26×1.9写成0.74×1.9+0.26×1.9
然后算式=（0.74+0.26）×1.9
最后算式=1×1.9=1.9

Answer 4

=7.4×0.19+2.6×0.19
=（7.4+2.6）×0.19
=10×0.19
=1.9

Answer 5

先把1.9分解成0.19×10
再提取它们相的公因数0.19
=7.4×0.19+0.26×0.19×10
=0.19×（7.4+0.26×10）
=0.19×（7.4+2.6）
=0.19×10
=1.9