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GVTH: Phạm Thị Thanh Liễu
Lôùp :
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Baøi cuõBaøi cuõLUYEÄN TAÄPLUYEÄN TAÄP
TÌM MOÄT SOÁ HAÏNG TRONG TÌM MOÄT SOÁ HAÏNG TRONG MOÄT TOÅNGMOÄT TOÅNG
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16
7
12
3
4
5 8
9
1011 1213
14 1517
18
6 19
202122
2324 25
39
2627
29
28
31
32
3435
363837
41
40 4344 45
4647
4850
Linh
30
Quân
Tài33 Trâm42
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Baøi cuõBaøi cuõLUYEÄN TAÄPLUYEÄN TAÄP
TÌM MOÄT SOÁ HAÏNG TRONG TÌM MOÄT SOÁ HAÏNG TRONG MOÄT TOÅNGMOÄT TOÅNG
1030 x810 x
2x3058 x
108x
28x
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SOÁ TROØN CHUÏC TRÖØ ÑI SOÁ TROØN CHUÏC TRÖØ ÑI MOÄT SOÁMOÄT SOÁ
Coù 40 que tính, bôùt ñi 8 que tính. Hoûi coøn bao nhieâu que tính?
40 – 8 = ?
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40 – 8 =40 – 8 =•0 khoâng tröø ñi 8,
laáy 10 tröø 8 baèng 2, vieát 2, nhôù 1.
•4 tröø 1 baèng 3, vieát 3.
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SOÁ TROØN CHUÏC TRÖØ ÑI SOÁ TROØN CHUÏC TRÖØ ÑI MOÄT SOÁMOÄT SOÁ
Coù 40 que tính, bôùt ñi 18 que tính. Hoûi coøn bao nhieâu que tính?
40 – 18 = ?
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40 – 18 =40 – 18 =•0 khoâng tröø ñi 8,
laáy 10 tröø 8 baèng 2, vieát 2, nhôù 1.
•1 theâm 1 baèng 2, 4 tröø 2 baèng 2,
vieát 2.
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1. Tính:
60915
505
902
45 88
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8054
301
8071 162 19 26
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2. Tìm x:
x 309x5
x 6019
a)
b)
c)
20
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2. Tìm x:
930 x21x
309 ) xa520 x
205 ) xb
15x
6019 ) xc1960 x
41x
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3. Coù 2 chuïc que tính, bôùt ñi 5 que tính. Hoûi coøn laïi bao nhieâu que tính? Baøi giaûi
2 chuïc = 20Soá que tính coøn laïi:
20 – 5 = 15 (que tính) Ñaùp soá: 15 que
tính
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Quaû taùo naøo ñaây?
??
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