1. 不计算,在〇里填上“>”“<”或“=”。
47 + 65 〇 48 + 65
27 + 70 〇 27 + 68
75 + 150 〇 150 + 30
11 + 50 〇 50 + 14
61 + 34 〇 64 + 33
41 + 198 〇 40 + 199
47 + 65 〇 48 + 65
27 + 70 〇 27 + 68
75 + 150 〇 150 + 30
11 + 50 〇 50 + 14
61 + 34 〇 64 + 33
41 + 198 〇 40 + 199
答案
1. < > > < < =
2.已知24+□=○+16,当□里填3时,○里应填(
11
);当□里填(25
)时,○里应填33。答案
1. 11 2. 25
3.想一想,填一填。
27 + □ = ○ + 30
62 + □ = 58 + ○
16 + □ = ○ + 22
□ + 15 = ○ + 25
20 + □ = 14 + ○
35 + □ = ○ + 18
19 + □ = ○ + 21
27 + □ = ○ + 16
27 + □ = ○ + 30
62 + □ = 58 + ○
16 + □ = ○ + 22
□ + 15 = ○ + 25
20 + □ = 14 + ○
35 + □ = ○ + 18
19 + □ = ○ + 21
27 + □ = ○ + 16
答案
答案不唯一,合理即可,示例:
$27 + \boxed{4} = ◯\ 1 + 30$
$62 + \boxed{1} = 58 + ◯\ 5$
$16 + \boxed{7} = ◯\ 1 + 22$
$\boxed{11} + 15 = ◯\ 1 + 25$
$20 + \boxed{1} = 14 + ◯\ 7$
$35 + \boxed{1} = ◯\ 18 + 18$
$19 + \boxed{3} = ◯\ 1 + 21$
$27 + \boxed{1} = ◯\ 12 + 16$
$27 + \boxed{4} = ◯\ 1 + 30$
$62 + \boxed{1} = 58 + ◯\ 5$
$16 + \boxed{7} = ◯\ 1 + 22$
$\boxed{11} + 15 = ◯\ 1 + 25$
$20 + \boxed{1} = 14 + ◯\ 7$
$35 + \boxed{1} = ◯\ 18 + 18$
$19 + \boxed{3} = ◯\ 1 + 21$
$27 + \boxed{1} = ◯\ 12 + 16$
1.为了营造活动氛围,同学们按照红、黄、绿、红、红、黄、绿、红……的顺序把气球串起来装饰操场。第34个气球是(
A.红
B.黄
C.绿
B
)色的,第80个气球是(A
)色的。A.红
B.黄
C.绿
答案
1.B 2.A
2.已知16+□=○+22,当□里填(
A.33
B.39
C.27
B
)时,○里应填33。A.33
B.39
C.27
答案
B
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