(1.25+2.5)×16 = 1.25×3.7×0.8= 3.4×9+3.4= 9.24×9+3.4=

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(1.25+2.5)×16 = 1.25×3.7×0.8= 3.4×9+3.4= 9.24×9+3.4=
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(1.25+2.5)×16 = 1.25×3.7×0.8= 3.4×9+3.4= 9.24×9+3.4=
(1.25+2.5)×16 = 1.25×3.7×0.8= 3.4×9+3.4= 9.24×9+3.4=

(1.25+2.5)×16 = 1.25×3.7×0.8= 3.4×9+3.4= 9.24×9+3.4=
(1.25+2.5)×16
=1.25x16+2.5x16
=1.25x8x2+2.5x4x4
=10x2+10x4
=20+40
=60
1.25×3.7×0.8
=1.25x0.8x3.7
=1x3.7
=3.7
3.4×9+3.4
=3.4x(9+1)
=3.4x10
=34

= =你确认这是个等式?!