簡算:4.4×5.5-44×0.33-0.44×22=?要細節
4.4×5.5-44×0.33-0.44×22
=4.4×5.5-4.4×3.3-4.4×2.2
=4.4×(5.5-3.3-2.2)
=4.4×0
=0
2.4×(16.2-12.8)÷0.3簡算
2.4×(16.2-12.8)÷0.3
=2.4÷0.3×(16.2-12.8)
=8×3.4
=(10-2)×3.4
=34-6.8
=27.2
3/8-11/27+5/8+16/27簡算
(3/8+5/8)-(11/27+16/27)
=0