0.8×0.76+0.48×0.4简便计算?

2025-05-13 03:26:30
推荐回答(1个)
回答1:

0.8×72.4×12.4
=0.8×72.4×(12.5-0.1)
=10x72.4-0.08x72.4
=724-(7.24-1.448)
=724-7.24+1.448
=714+2.76+1.448
=714+3+1.448-0.24
=718.208