(1) 45 × 3.5 + 5.5 × 80% + 0.8 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; (2) 1116 + 813 - (1116-813) (3) 13 △ 23-25) × 35 | Math enthusiast | Mathematical art

(1) 45 × 3.5 + 5.5 × 80% + 0.8 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; (2) 1116 + 813 - (1116-813) (3) 13 △ 23-25) × 35

（1）45×3.5+5.5×80%+0.8 =（3.5+5.5+1）×0.8=10×0.8=8；（2）1116+813-（1116-813）=（1116-1116）+（813+813）=0+1613=1313；（3）13÷（23-25）×35=13÷415×35=13×154×35=34．

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