根据运算定律,在 里填上合适的数.(1)6.1×4.5+3.9×4.5=( +3.9)× (2)0.69×1

2025-03-29 01:20:24
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回答1:


(1)6.1×4.5+3.9×4.5,
=(6.1+3.9)×4.5,
=10×4.5,
=45;

(2)0.69×101,
=0.69×(100+1),
=0.69×100+0.69×1,
=69+0.69,
=69.69.

故答案为:6.1,4.5,0.69,100,0.69,1.