Na dzisiaj.! Klasa 5, Ułamki
Zad.1
a)2/5 + 3/10 = 4/10 + 3+10 =
b) 2/3 + 1/6 =
c) 2/3 + 2/9 =
d) 1 1/5 + 2 7/10 =
e) 2/5 - 1/10 =
f) 5/3 - 5/6 =
g) 1 1/2 - 3/4 =
h) 3 1/3 - 1 1/6
Zad.2
a) 1/3 + 3/4 = 4/12 + 9/12 = 13/12 = 1 1/12
2/3 + 5/7 =
5/6 + 4/9 =
5/8 + 7/10 =
b) 2 3/4 + 1/3 =
6 8/9 + 2 1/10 =
2 7/9 + 3 5/6 =
2 9/10 + 3 7/15
c) 3/4 - 2/5 =
5/8 - 2/5 =
3/4 - 1/6 =
1 5/6 - 3/8 =
d) 5 7/9 - 1 1/2 =
8 1/6 - 2 2/5 =
5 1/4 + 1 1/6 =
8 3/4 - 2 7/10
Zad.3
Każdy z naryswanych dzbanków ma pojemność 1 1/2. Pod rysunkami zapisano, ile soku nalano już do poszczególnych dzbanków. Pokoloruj ten drzbanek, do którego można dolać jeszcze 3/4 soku.
........................
.......................... (dzbanki)
.......................... 4/5 5/6 5/8
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2/5+3/10=4/10+3/10=7/10
4/10+3/10=7/10
2/3+1/16=32/48+3/48=35/48
2/3+2/9=6/9+2/9=8/9
2/5-1/10=4/10-1/10=3/10
5/3-5/6=1 2/3- 5/6=10/6-5/6=5/6
1 1/2-3/4=11/2-3/4=5 1/2-3/4=4 6/4-3/4=4 3/4
3 1/3-1/16=31/3-11/6=10/1/3-1 5/6=10 2/6-1 5/6=9 8/6-1 5/6=8 3/6=8 1/2
ZAD 2
1/3+3/4=4/12+9/12=13/12=1 1/12
4/12+9/12=13/12=1 1/12
2/3+5/7=14/21+15/21=29/21=1 8/21
5/6+4/9=15/18+8/18=23/18=1 5/18
5/8+7/10=25/40+28/40=53/40=1 13/40
B 2 3/4+1/3=23/4+1/3=5 3/4+1/3=5 9/12+4/12=5 13/12=6 1/2
6 8/9+2 1/10=68/9+21/10=7 5/9+2 1/10=7 50/90+2 9/90=9 59/90
2 7/9+3 5/6=27/9+35/6=3+5 5/6=8 5/6
2 9/10+3 7/15=29/10+37/15=2 9 10+2 7/15=2 27/30+2 14/30=4 41/30= 5 11/30
C 3/4- 2/5=15/20-8/20=7/20
5/8-2/5=25/40-16/40=9/40
3/4-1/6=9/12-2/12=7/12
1 5/6-3/8=15/6-3/8=2 3/6-3/8=2 12/24-9/24=2 3/24=2 1/8
D
5 7/9-1 1/2=57/9-11/2=6 3/9-5 1/2=6 6/18-5 9/18=5 24/18-5 9/18=15/18=5/6
8 1/6-2 2/5=13 3/6-4 2/5=13 15/30-4 12/30=9 3/30=9 1/10
5 1/4+1 1/16=51/4+11/6=12 3/4+1 5/6=12 9/12+1 10/12=13 19/12=14 7/12
8 3/4-2 7/10=20 3/4-2 7/10= 20 15/20-2 14/20=18 1/20