口算下面各题:3×3= 8×6= 5×7= 88+8= 3×6= 8×7= 6×5= 67-40= 8+37= 48-7

1个回答

  • 解题思路:5×8+20先算乘法,再算加法;38-18+25先算减法,再算加法;6×4-10先算乘法,再算减法;其它题目根据运算法则直接求解.

    3×3=9, 8×6=48, 5×7=35, 88+8=96,

    3×6=18, 8×7=56, 6×5=30, 67-40=27,

    8+37=45, 48-7=41, 32-8=24, 40+28=68,

    8×2=16, 4×9=36, 41-2=39, 5×8+20=60,

    38-18+25=45, 6×4-10=14.故答案为:9,48,35,96,18,56,30,27,45,41,24,68,16,36,39,60,45,14.

    点评:

    本题考点: 整数的乘法及应用;整数的加法和减法;整数四则混合运算.

    考点点评: 本题考查了基本的计算,计算时要细心,注意运算的顺序.