THE SEQUENCE OF OPERATIONS. CALCULATION OF
THE VALUE OF AN EQUATION.
1. Why do you get different answers if you calculate with same numbers?
| 120 + 40 · 2 = .......... (120 + 40) · 2 = .......... 90 + 60 : 5 = .......... (90 + 60) : 5 = .......... |
100 - 30 · 2 = .......... (100 - 30) · 2 = .......... 500 - 180 : 2 = .......... |
2. The
value of which equations does not change without using parentheses? Why
| (50 · 4) + (60 · 3) = .......... (300 : 6) - (280 : 7) = .......... |
(300 - 50) · 6 = .......... (320 + 120) : 4 = .......... |
10 · (40 + 10) : 5 = .......... 750 - (80 + 5 · 6) = .......... |
3. Do your sums!
Check if the answer is amount these numbers beside.
| 186 + 4 · 15 - 90 = .......... 579 - 3 · 30 + 10 · 0 = .......... 463 + 12 · 5 - 4 · 10 = ........... |
156, 166, 146 499, 489, 479 483, 493, 473 |