9.99x1.88+1.12x19.44简便运算怎么算?
1个回答
关注
展开全部
你好,9.99x1.88+1.12x19.44=(10-0.01)x1.88+(1+0.1+0.02)x19.44
咨询记录 · 回答于2022-09-07
9.99x1.88+1.12x19.44简便运算怎么算?
9.99x8.88+1.12x19.44
你好,9.99x1.88+1.12x19.44=(10-0.01)x1.88+(1+0.1+0.02)x19.44
不是9.99x1.88,是9.99x8.88
对
9.99x8.88+1.12x19.44=(10-0.01)x8.88+(1+0.1+0.02)x19.44=10x8.88-0.01x8.88+1x19.44+0.1x19.44+0.02x19.44=88.8-0.888+19.44+1.944+0.3844=109.6804
9.99x8.88+1.12x19.44=(10-0.01)x8.88+(1+0.1+0.02)x19.44=10x8.88-0.01x8.88+1x19.44+0.1x19.44+0.02x19.44=88.8-0.0888+19.44+1.944+0.3888=104.484
9.99x8.88+1.12x19.44=(10-0.01)x8.88+(1+0.1+0.02)x19.44=10x8.88-0.01x8.88+1x19.44+0.1x19.44+0.02x19.44=88.8-0.0888+19.44+1.944+0.3888=110.484
你好,正确答案是110.484
9.99x8.88=(10-0.01)x8.88=10x8.88-0.01x8.88=88.8-0.0888
1.12x19.44=(1+0.1+0.02)x19.44=1x19.44+0.1x19.44+0.02x19.44