1. .........................=7,6
1) 4 1/2 - 0,7=4 5/10 - 0,7=4,5-0,7=3,8
2) 1,85+3/20=1,85+15/100=1,85+0,15=2
3) 3,8*2=7,6
2. ....................=7,36
1) 2,6+1 2/5=2,6+1 4/10=2,6+1,4=4
2) 4 - 2 4/25=4 - 2 16/100=4 - 2,16=1,84
3) 4 * 1,84=7,36
3. .........................=6
1) 7 2/5+6,4=7 4/10 +6,4=7,4+6,4=13,8
2) 5,2 - 2 9/10=5,2-2,9=2,3
3) 13,8:2,3=6
4. .......................=9
1) 14 - 2 3/10=14 - 2,3=11,7
2) 3/5 +0,7=6/10+0,7=0,6+0,7=1,3
3) 11,7:1,3=9