Mind Castle — Lesson 109: Mind math: mixed practice
Game time: Wildwood Number Duel →Lesson 109: Abacus mental math practice for kids
Level 9, Mind Castle. Flash sums, listening sums and covered sums, mixed.
What your child does, card by card
Mind math: mixed practice. Practice day! PlayBuddy opens the lesson: “Practice time. Let's get quicker and better.”
Flash sums in your head: the abacus is covered and the numbers appear one at a time, 1.1 seconds each (6 + 5 + 4, 12 + 23 + 31 and 9 - 2 + 7 + 5); your child adds them in the head and picks the total from 15, 19 and 66.
Listening sums: nothing is shown. The browser’s voice reads each number (4 plus 6 plus 3 and 20 plus 15 plus 10), and your child picks the total from 13, 45 and 55. With the sound off, the numbers are shown instead.
In your head: the abacus is covered and your child works out 8 + 9 + 10, 25 + 36 and 47 - 8, picking each answer from 27, 39 and 61.
You're ready! Mind math of every kind.
What this lesson trains
About five minutes and 8 answers. Altogether the child makes 0 bead moves (0 with the top bead, 0 with bottom beads). The work stays at 0 or below, on one rod. Then 3 quick looks in your head.
Fingers and hands
Below the abacus the drawn hands show zero and here, finger for bead.
What PlayBuddy and PlayType say
PlayBuddy: “Practice time. Let's get quicker and better.”
PlayBuddy: “Click Let's Begin, or press Enter!”
PlayType: “Now do it in your head.”
Stars
With no slips across the 8 answers your child earns three stars; 2 or fewer, two.