问题补充:
八分之七乘以七加八分之三,十二分之七乘以六加十二分之五乘以六,五分之三乘以六分之五
答案:
7/8×7+3/8
=(7+1)×3/8
=8×3/8
=37/12×6+5/12×6
=6×(7/12+5/12)
=6×1=63/5×5/6
=3/6=1/2======以下答案可供参考======
供参考答案1:
7/8 ×7+3/8
=49/8+3/8
=52/8=13/27/12 ×6+5/12 ×6
=42/12+30/12
=72/12
=63/5 ×5/6
=15/30
=1/2
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