Matemáticas mentales Worksheet
Recommended for 1er grado — 5to grado
Matemáticas mentales Worksheet
Name: ____________________Date: ____________
Instructions: Usar estrategias mentales como sumar diez, duplicar y compensar para calcular rápidamente.
20 problems
49 + 10 = ______
2 × 10 = ______
82 + 20 = ______
22 + 10 = ______
43 + 10 = ______
5 × 10 = ______
20 + 20 = ______
62 − 10 = ______
21 + 20 = ______
35 − 10 = ______
90 − 10 = ______
64 − 10 = ______
36 + 20 = ______
45 − 10 = ______
28 − 10 = ______
26 + 20 = ______
7 × 10 = ______
9 × 10 = ______
40 − 10 = ______
89 + 10 = ______
