计算 7×9= 50+12= 9×4= 85-11= 6×7= 30-20= 13+6= 3×8= 46-30= 2×6= 5×4=

2025-02-02 23:57:28
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回答1:

解:
7×9=63

50+12=62

9×4=36

85-11=74

6×7=42
30-20=10 13+6=19 3×8=24 46-30=16 2×6=12
5×4=20 6×5=30 6×6-6=30 8×7+8=64 4×9-9=27