Level 1
Find the value of 25 x 2 - 14 ÷ 5.
1 m
Level 2
Find the following values without a calculator.
  1. 310 + 410 + 210 = _____ x 110 + 210
  2. 811 - 311 - 211 = 711 - _____ x 111
  3. 56 + 36 - 16 = _____ x 16 - 16
  4. 1 17 + 27 = 17 x _____ + 17
3 m