1.340÷5+340÷52.55×101-55+16×253.8421-277-623+5794.(364-456)-(544-636)5.62×4+44×5+5×186.6200÷1247.(7500÷15)÷(25×2)8.3400-62×34-38×20-38×14有些可以巧算,有些不可以巧算,最好巧算哦,

问题描述:

1.340÷5+340÷5
2.55×101-55+16×25
3.8421-277-623+579
4.(364-456)-(544-636)
5.62×4+44×5+5×18
6.6200÷124
7.(7500÷15)÷(25×2)
8.3400-62×34-38×20-38×14
有些可以巧算,有些不可以巧算,最好巧算哦,

1.340÷5+340÷5=68+68=1362.55×101-55+16×25=55×(100+1)-55+400=5500+55-55+400=59003.8421-277-623+579=8421+579-(277+623)=9000-900=81004.(364-456)-(544-636)=364-456-5...