1. A. 2,17×1O⇒21,7 B. 1372÷100⇒13,72
0,076×100⇒7,6 8,14÷10⇒0,814
1,036×1000⇒1,036 267,9÷1000⇒0,2679
14,21×100⇒1,421 15,28÷100⇒0,1528
2. A. 6,48 6,48 ⁻egale B. 4,17 0,417⁻ prima e mai mare
5,06 5,60⁻ a doua e mai mare 4,17 47,4⁻ a doua e ma mare
13,29 132,9⁻ a doua e mai mare 12,4 12,4⁻ egale
3. A. 45,08 plus 23,96 ⇒ 69,04 B. 90,6 minus 41,09⇒49,51
4. 23,43×10-2,6²₊ 2,07ₓ3,1÷100
1.... 23,43×10⇒234,3
2...... 2,07×3,1⇒6,417
3......6,417÷100⇒0,06417
4.......234,3- 6,76⇒227,54
5.......0,06417 ₊ 227,54⇒227,60417
egal 227,60417
5. Lungimea-22,7
Latimea-cu 5,56 m mai mica
PERIMETRUL---
ARIA-----
rezolvare
1....22,7-5,56=17,14
2.....17,14×2₊22,7×2=79,68- perimetrul
3......17,14×22,7=389,078- aria
