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题型:判断题 题类:易错题 难易度:普通
北师大版数学三年级上册第一章第二节过河同步练习
27÷(12-9)={#blank#}1{#/blank#} (75-30)÷9={#blank#}2{#/blank#} 6×(4+5)={#blank#}3{#/blank#}
(13×3-9)÷3
=39-9÷3
=39-3
=36
3 × 4 + 3 = 2 × 8 – 2 = 2×5 + 2 = 3 × 8 – 3 =
6 × 3 – 6 = 5 × 4 – 5 = 7 ×2 + 2 = 5 × 4 – 5 =
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