Maths Crossword

123456
Across
  1. 3. -15 + (30 ÷ 5 × 6 ÷ 2) × 9 - 3
  2. 5. what comes next? 23, 40, 74, 142
  3. 6. how many significant figures does the answer to this solution have? 55.924 + 28.702 + 93.352
Down
  1. 1. what comes next? 52, 65, 39, 78, 26
  2. 2. A kilogram has 1000 grams in it. How many significant figures does this number have?
  3. 3. 4 x (7 x 4²) ÷ 4 + 74 – 16
  4. 4. Joe is editing a photograph on his laptop. He rotates the photograph 120° degrees clockwise. He then rotates it another 160° degrees clockwise. If he continues turning the photo in a clockwise movement, how many degrees will Joe need to turn it to have made a complete 360° degree turn?