Fish in the sea
(1) Calculate, paying attention to the parentheses
| (47 + 8) + 8 = | (70 + 7) + 5 = | (88 + 7) + 7 = | 8 + (73 + 8) = |
| 10 + (35 + 20) = | 5 + (54 + 8) = | (35 + 18) + 9 = | 10 + (43 + 6) = |
(2) Calculate:
| 45 + = 62 | + 55 = 100 | 68 − = 25 | − 23 = 69 |
| 26 + = 83 | + 52 = 82 | 96 − = 35 | − 69 = 30 |
| 53 + = 95 | + 73 = 97 | 80 − = 33 | − 53 = 35 |
(3) Subtract and check by adding
| 81 − 40 = 41 | since 41 + 40 = 81 | 71 − 20 = | since + 20 = |
| 90 − 40 = | since + 40 = | 95 − 50 = | since + 50 = |
| 59 − 30 = | since + 30 = | 41 − 30 = | since + 30 = |
| 71 − 20 = | since + 20 = | 53 − 10 = | since + 10 = |
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Captain Arthur went fishing. First, he caught 18 colorful fish in his net. A little later, while sailing past a coral reef, he caught another 8 blue fish.
(a) How many fish did Captain Arthur catch in total? After that, while returning to the harbor, several seagulls circled above the boat. One seagull grabbed 8 fish from the net.(b) How many fish remained in Captain Arthur's net? Finally, when he arrived at the harbor, his friend Xavi gave him another 20 small, silver fish that he had caught himself.(c) How many fish does Captain Arthur have in total now? (d) Additional question below the image (for those who want more) → |
 If Captain Arthur decided to give half of all his fish to his cat named Noah, how many fish would Noah receive? |