127*99
=127×(100-1)
=127×100-127
=12700-127
=12573
2.2÷0.25
=(2.2×4)÷(0.25×4)
=8.8
12.5×4.8×0.3
=(12.5×0.8)×(6×0.3)
=10×1,8
=18
127*99
=127×(100-1)
=127×100-127
=12700-127
=12573
2.2÷0.25
=(2.2×4)÷(0.25×4)
=8.8
12.5×4.8×0.3
=(12.5×0.8)×(6×0.3)
=10×1,8
=18