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7.68×98+5.68+5.68
=7.68×(100-2)+2×5.68
=768-15.36+11.36
=768-(15.36-11.36)
=768-4
=764
=7.68×(100-2)+2×5.68
=768-15.36+11.36
=768-(15.36-11.36)
=768-4
=764
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展开全部
7.68×98+5.68+5.68
=(2+5.68)×98+5.68×2
=2×98+5.68×98+5.68×2
=196+5.68×(98+2)
=196+5.68×100
=200-4+568
=764
=(2+5.68)×98+5.68×2
=2×98+5.68×98+5.68×2
=196+5.68×(98+2)
=196+5.68×100
=200-4+568
=764
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