2026年天天练口算四年级数学下册人教版第53页答案
4
$2.7 + 1.5 =$ $8.9 - 4.7 - 1.2 =$ $9.8 - 4.8 =$
$2.5 + 2.55 =$ $9 - (2.6 + 3.4) =$ $5.1 - 3.9 =$
$6.8 - 2.5 =$ $60 - 32.5 - 4 =$ $6.6 + 3 =$
$0.8 + 0.14 =$ $14 - 1.6 + 2.7 =$ $6.89 - 0.08 =$
$3 - 1.6 =$ $4.85 + 0.96 + 3.2 =$ $0.7 + (0.33 + 0.5) =$
$6.4 - 3.6 =$ $2.5 + 3.2 + 7.4 =$ $0.25 + 0.75 - 1 =$
$6 + 0.4 =$ $1.3 + (0.7 - 0.3) =$ $9 + 0.1 - 0.1 =$
$4.75 - 1.9 =$ $1.2 - 0.8 + 3.5 =$ $1.29 - 0.18 + 5.4 =$
$6.5 - 1.5 =$ $6.3 + 3.7 + 4 =$ $0.9 + 0.1 - 0.5 =$
$1.8 + 2.9 =$ $1 - 0.07 + 2.1 =$ $10 - 0.8 - 4.3 =$

答案

$2.7 + 1.5 = 4.2$;
$8.9 - 4.7 - 1.2 = 3$;
$9.8 - 4.8 = 5$;
$2.5 + 2.55 = 5.05$;
$9 - (2.6 + 3.4) = 3$;
$5.1 - 3.9 = 1.2$;
$6.8 - 2.5 = 4.3$;
$60 - 32.5 - 4 = 23.5$;
$6.6 + 3 = 9.6$;
$0.8 + 0.14 = 0.94$;
$14 - 1.6 + 2.7 = 15.1$;
$6.89 - 0.08 = 6.81$;
$3 - 1.6 = 1.4$;
$4.85 + 0.96 + 3.2 = 9.01$;
$0.7 + (0.33 + 0.5) = 1.53$;
$6.4 - 3.6 = 2.8$;
$2.5 + 3.2 + 7.4 = 13.1$;
$0.25 + 0.75 - 1 = 0$;
$6 + 0.4 = 6.4$;
$1.3 + (0.7 - 0.3) = 1.7$;
$9 + 0.1 - 0.1 = 9$;
$4.75 - 1.9 = 2.85$;
$1.2 - 0.8 + 3.5 = 3.9$;
$1.29 - 0.18 + 5.4 = 6.51$;
$6.5 - 1.5 = 5$;
$6.3 + 3.7 + 4 = 14$;
$0.9 + 0.1 - 0.5 = 0.5$;
$1.8 + 2.9 = 4.7$;
$1 - 0.07 + 2.1 = 3.03$;
$10 - 0.8 - 4.3 = 4.9$。
把得数小于 12.6 的算式用波浪线画出来
$3.2 + 7.2$ $7.2 + 10.65$ $10.65 + 2$
$3.2 + 9.6$ $10.45 + 1.2$ $3.5 + 6.67$
$4.3 + 3.5$ $6.4 + 9.6$ $5.5 + 3.5$
$13.6 - 4.35$ $19.3 - 6.6$ $20 - 14.5$
$15.3 - 2.5$ $16.8 - 4.95$ $22 - 9.35$
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答案

$\underline{3.2 + 7.2}$
$\underline{10.65 + 2}$
$\underline{3.2 + 9.6}$
$\underline{10.45 + 1.2}$
$\underline{3.5 + 6.67}$
$\underline{4.3 + 3.5}$
$\underline{5.5 + 3.5}$
$\underline{13.6 - 4.35}$
$\underline{20 - 14.5}$