Câu số 34: The average of 79; 63 and 59 is………….. Câu số 35: The perimeter of a rectangle is 58cm and its width is 13cm less than its length. Its width is …….cm Câu số 36: Calculate: 4321 × 2 = …. Câu số 37: If the average of A and 6 is 10 then A = ……… Câu số 38: Compare: 3170 – (4123 – 1892) ………..3170 – 4123 + 1892 Câu số 39: Three years ago, Nora was half as old as Mary is now. If Mary is four years older than Nora then Mary is ………….years old now. Câu số 40: Compare: 5328 ……….5283 Câu số 41: The average of age of mother and daughter is 21 years. Mother is 24 years older than daughter. Daughter is …………years old. 5 sao đáp án ko cần giải thích thanks