精準學與練三年級數學人教版
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混合運算專項訓練(1)
$53 - 26 + 18$ $89 - (45 + 36)$ $28 + 6×9$ $48÷(36 - 28)$ $35 + 3×7$ $(29 + 16)÷9$ $66 - 56÷8$ $25 - 24÷4$ $49÷7 + 9$ $19 + 7 + 57$ $48÷6 + 27$ $72÷9×4$ $56 - 36÷4$ $27÷(9÷3)$ $(48 + 6)÷6$ $(36 - 29)×6$ $2×9÷6$ $65 - 27÷9$ $6 + 3×8$ $56÷(12 - 4)$ $48 - 15 + 28$
答案:$53 - 26 + 18 = 27 + 18 = 45$
$89 - (45 + 36) = 89 - 81 = 8$
$28 + 6×9 = 28 + 54 = 82$
$48÷(36 - 28) = 48÷8 = 6$
$35 + 3×7 = 35 + 21 = 56$
$(29 + 16)÷9 = 45÷9 = 5$
$66 - 56÷8 = 66 - 7 = 59$
$25 - 24÷4 = 25 - 6 = 19$
$49÷7 + 9 = 7 + 9 = 16$
$19 + 7 + 57 = 26 + 57 = 83$
$48÷6 + 27 = 8 + 27 = 35$
$72÷9×4 = 8×4 = 32$
$56 - 36÷4 = 56 - 9 = 47$
$27÷(9÷3) = 27÷3 = 9$
$(48 + 6)÷6 = 54÷6 = 9$
$(36 - 29)×6 = 7×6 = 42$
$2×9÷6 = 18÷6 = 3$
$65 - 27÷9 = 65 - 3 = 62$
$6 + 3×8 = 6 + 24 = 30$
$56÷(12 - 4) = 56÷8 = 7$
$48 - 15 + 28 = 33 + 28 = 61$
解析:均按混合運算順序計算,有括號先算括號內,先乘除后加減,同級從左到右。