6.72×9.9+0.672
=6.72×9.9+6.72×0.1
=6.72×(9.9+0.1)
=6.72×10
=67.2
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缺少运算符号,补充一下,
(1)(76+35)÷3, =111÷3, =37; (2)894-60×3, =894-180, =714; (3)6×29×5, =6×5×29, =30×29, =870; (4)525÷5÷3, =105÷3, =35; (5)126+840÷6, =126+140, =266; (6)672÷(2×4), =672÷8, =84.