2026年天天练口算一年级数学下册人教版第57页答案
11
(
) + 20 = 83
(
) + 9 = 88
63 + (
) = 70
13 + (
) = 56
32 + (
) = 52
(
) + 33 = 53
57 + (
) = 73
26 + (
) = 78
(
) + 18 = 88
17 + (
) = 50
45 + (
) = 50
63 + (
) = 93
(
) + 4 = 100
(
) + 25 = 85
46 + (
) = 60
15 + (
) = 50
(
) + 10 = 62
(
) + 8 = 90
(
) + 25 = 30
(
) + 6 = 39
在◯里填“>”“<”或“=”
67 + 8 ◯ 68 + 732 + 18 ◯ 67 + 1853 - 8 ◯ 53 - 945 + 19 ◯ 56 + 2591 - 9 ◯ 91 + 973 - 24 ◯ 69 - 14
连一连

答案

63;79;7;43;20;20;16;52;70;33;5;30;96;60;14;35;52;82;5;33;=;<;>;<;<;<;
(连线:得数比50大:27+28、77-16、29+25;得数比50小:84-78、73-35、90-52、77-29)

解析

1. 求括号里的数,用和减去已知的加数:
$83 - 20 = 63$
$88 - 9 = 79$
$70 - 63 = 7$
$56 - 13 = 43$
$52 - 32 = 20$
$53 - 33 = 20$
$73 - 57 = 16$
$78 - 26 = 52$
$88 - 18 = 70$
$50 - 17 = 33$
$50 - 45 = 5$
$93 - 63 = 30$
$100 - 4 = 96$
$85 - 25 = 60$
$60 - 46 = 14$
$50 - 15 = 35$
$62 - 10 = 52$
$90 - 8 = 82$
$30 - 25 = 5$
$39 - 6 = 33$
2. 比较大小:
$67 + 8 = 75$,$68 + 7 = 75$,所以$67 + 8 = 68 + 7$
$32 + 18 = 50$,$67 + 18 = 85$,所以$32 + 18 < 67 + 18$
$53 - 8 = 45$,$53 - 9 = 44$,所以$53 - 8 > 53 - 9$
$45 + 19 = 64$,$56 + 25 = 81$,所以$45 + 19 < 56 + 25$
$91 - 9 = 82$,$91 + 9 = 100$,所以$91 - 9 < 91 + 9$
$73 - 24 = 49$,$69 - 14 = 55$,所以$73 - 24 < 69 - 14$
3. 连线(计算各算式结果):
$27 + 28 = 55$(比50大)
$84 - 78 = 6$(比50小)
$73 - 35 = 38$(比50小)
$77 - 16 = 61$(比50大)
$90 - 52 = 38$(比50小)
$29 + 25 = 54$(比50大)
$77 - 29 = 48$(比50小)