Question

Tính nhẩm:

40 -20=                               50-30=                            30-4=                          20-10=

                     20+30=                           29+30=                            34+20=

Answer 1

20-10 nha

 

Answer 2

40-20=20

30-4=26

50-30=20

20-10=10

20+30=50

29+30=59

34+20=54

Answer 3

40-20=20

30-4=26

50-30=20

20-10=10

20+30=50

29+30=59

34+20=54

Answer 4

20,10,50,54,20,59,26

Answer 5

40-20=20

30-4=26

50-30=20

20-10=10

20+30=50

29+30=59

34+20=54

Answer 6

20-10=10

Answer 7

40-20=20

30-4=26

50-30=20

20-10=10

20+30=50

29+30=59

34+20=54

Answer 8

40-20=20

30-4=26

50-30=20

20-10=10

20+30=50

29+30=59

34+20=54

Answer 9

40-20=20                       50-30=20                          30-4=26           20-10=10      20+30=50                      29+30=59                        34+20=54                                                                

Answer 10

20,20,26,10,50,59,54

Answer 11

40-20=20

30-4=26

50-30=20

20-10=10

20+30=50

29+30=59

34+20=54

Answer 12

40-20=20

30-4=26

50-30=20

20-10=10

20+30=50

29+30=59

34+20=54

Answer 13

40-20=20

30-4=26

50-30=20

20-10=10

20+30=50

29+30=59

34+20=54

Answer 14

20 20 26 10 50 59 54 ghi theo thứ tự mỗi một cách là một đáp án theo thứ tự câu

Answer 15

20

50

20

59

26

54

10

Answer 16

20
60
20
59
26
54
10

Answer 17

\(\text{40-20=20 30-4=26 50-30=20 20-10=10 20+30=50 29+30=59 34+20=54}\)