6.8x16.8+19.3x3.2

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2025-02-02 13:48:21
推荐回答(1个)
回答1:

6.8×16.8+19.3×3.2
把19.3分成16.8和2.5
=6.8×16.8+16.8×3.2+2.5×3.2

=(6.8+3.2)×16.8+2.5×4×0.8

=168+8

=176