Question

3.78×5.2÷3.78×5.2的脱式计算

Answer 1

3.78×5.2÷3.78×5.2
＝3.78÷3.78×5.2×5.2
＝1×5.2×5.2
＝5×5.2＋0.2×5.2
＝26＋1.04
＝27.04

Answer 2

3.78×5.2÷3.78×5.2
=3.78÷3/78×5.2×5.2
=1×5.2×5.2
=5.2²
=(5+0.2)²
=5²+2×5×0.2+0.2²
=15+2+0.04
=17.04