解:1.4+12.6÷0.26×0.2等于( 721/65 )
∵已知需求出1.4+12.6÷0.26×0.2等于多少
∴1.4 + 12.6 ÷ 0.26 × 0.2
= (1×10+4)/10 + (12×10+6)/10 ÷ 26/100 × 2/10
= 14/10 + 126/10 ÷ 13/50 × 1/5
= 7/5 + 63/5 × 50/13 × 1/5
= 7/5 + 630/13 × 1/5
= 7/5 + 126/13
= (7×13)/(5×13)+(126×5)/(13×5)
= 91/65 + 630/65
= 721/65
答:1.4+12.6÷0.26×0.2等于721/65
≈1.4+48.46*0.2
≈1.4+9.7
≈11.1