3.5×9.2+0.8=3.5×(10-0.8)+0.8=3.5×10-3.5×0.8+0.8=35-0.8×(3.5-1)=35-0.8×2.5=35-2=33
亲,您好,很高兴为您解答。3.5x9.2+0.8=3.5x(10-0.8)+0.8=33
3.5x(10-0.8)+0.8=3.5x10-3.5x0.8+0.8=3.5x10-3.4x0.8
=3.5×(10-0.8)+0.8=3.5×10-2.5×0.8=35-2=33