简算:56.8×35.7+56.8×28.5+64.2×43.2细节

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简算:56.8×35.7+56.8×28.5+64.2×43.2细节简算:56.8×35.7+56.8×28.5+64.2×43.2细节简算:56.8×35.7+56.8×28.5+64.2×43.2

简算:56.8×35.7+56.8×28.5+64.2×43.2细节
简算:56.8×35.7+56.8×28.5+64.2×43.2细节

简算:56.8×35.7+56.8×28.5+64.2×43.2细节
56.8×35.7+56.8×28.5+64.2×43.2
=56.8×(35.7+28.5)+64.2×43.2
=56.8×64.2+64.2×43.2
=64.2×(43.2+56.8)
=64.2×100
=6420

56.8×(35.7+56.8)+64.2×43.2

56.8x35.7+56.8x28.5+64.2x43.2
=56.8x(35.7+28.5)+64.2x43.2
=56.8x64.2+64.2x43.2
=64.2x(56.8+43.2)
=64.2x100
=6420