1.原式=18×6/7+6×1/7+16/7×6
=18×6/7+(6×1/7+16/7×6)(乘法分配率)
=18×6/7+6×17/7
=18×6/7+17×6/7
=(18+17)×6/7
=30
2.24÷1/4=96(分米) 96×(1-1/4)÷(5+3)=9 9×5=45 (第一段) 9×3=27 (第二段)
1.原式=18×6/7+6×1/7+16/7×6
=18×6/7+(6×1/7+16/7×6)(乘法分配率)
=18×6/7+6×17/7
=18×6/7+17×6/7
=(18+17)×6/7
=30
2.24÷1/4=96(分米) 96×(1-1/4)÷(5+3)=9 9×5=45 (第一段) 9×3=27 (第二段)